Novel Clock Recovery Module for MPEG-2 Transport Stream in Terrestrial Television

Abstract

The paper presents an efficient low cost clock recovery module used in the Set Top Box for terrestrial television. It addresses the effects of jitter on MPEG-2 Transport streams for DVB-T. Lot of research on algorithms for IP and ATM networks has been carried out but the problem for terrestrial networks has not been sufficiently addressed. These algorithms require more CPU time and involve complex calculations which are difficult to implement in set top boxes due to the real time system constraints and cost considerations. A moving window FIR filter approach has been used in our module. This module is simulated in terrestrial and satellite environment and observed that it performs efficiently under high jittery conditions. This method was also implemented on a set top box SOC (system-on-chip) and it demonstrated high performance.